Contract Assets (Details) - USD ($)	3 Months Ended
Jun. 30, 2026	Jun. 30, 2025
Contract Assets [Abstract]
Long-term contract assets, write-down	$ 705,000	$ 1,026,000

Amount of loss from reductions in long-term contract assets due to quarterly revaluation of contract assets.

No definition available.

Name:	mpaa_LongTermContractAssetsWriteDown
Namespace Prefix:	mpaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration